<template>
  <view>
    <view class="goods-list">
      <view v-for="(item, i) in goodsList" :key="i" @click="gotoDetail(item)">
        <!-- 封装item组件，通过动态绑定传递数据 -->
        <my-goods :item="item"></my-goods>

      </view>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        // 请求参数对象
        queryObj: {
          query: '',
          cid: '',
          pagenum: 1,
          pagesize: 10
        },
        goodsList: [],
        total: 0,
        isloading: false

      };
    },
    onLoad(options) {
      this.queryObj.query = options.query || ''
      this.queryObj.cid = options.cid || ''
      this.getGoodsList()
    },

    methods: {
      async getGoodsList(cb) {
        this.isloading = true
        const {
          data: res
        } = await uni.$http.get('/api/public/v1/goods/search', this.queryObj)
        this.isloading = false
        
        // 短路运算符判断有无回调函数cb传进来，若有即为onReachBottom()函数触发的getGoodsList(cb)函数
        cb&&cb()
        
        if (res.meta.status !== 200)
          return uni.$showMsg()
        this.goodsList = [...this.goodsList, ...res.message.goods]
        this.total = res.message.total
      },
      
      gotoDetail(item){
        uni.navigateTo({
          url:'/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id
        })
      }
    },

    onReachBottom() {
      if (this.queryObj.pagesize * this.queryObj.pagenum >= this.total) return uni.$showMsg('数据加载完毕!')
        if (this.isloading) return

      this.queryObj.pagenum += 1
      this.getGoodsList()
    },
    
    onPullDownRefresh(){
      this.queryObj.pagenum = 1
      this.total=0
      this.isloading = false
      this.goodsList = []
      this.getGoodsList(()=>uni.stopPullDownRefresh())
    }
  }
</script>

<style lang="scss">

</style>
